Razor



sept. 23, 1941. L. KUHNL 2,256,810

RAZOR Filed July 3, 1940 ATTORNEY Patented Sept. 23, 1941 RAZOR Leopold Bridgeport, Conn., assignor to Magazine Repeating Razor- Company, INew York, N. Y., a corporation of New Jersey Application July 3, 1940, Serial No. 343,683

` (ci. en -4o) 2 Claims.

. are resiliently brought into blade-clamping position.

More particularly, the object is an improved razor of the character above described, in which provision is made whereby vwhen the aligning finger of a magazine injector is inserted in the aligning slot in the razor, the parts are partially separated to increase the height and width of the blade channel to permit easy entrance into (with reference to the position shown in the drawing), as indicated at I4, and is turned over at I atapproximately a right-angle bend to vform the blade-supporting platform I6, which and exit therefrom, and whereby upon with; drawal of the aligning finger they are resiliently brought together into blade-clamping relation.

A further object is a razor of the above described character in which a separate spring is made use of to resiliently draw the blade-clamping parts into blade-clamping position; and a further object is to install the spring in such a manner that the line of force through which it acts is composed of two components, one component drawing the clamping plate against a face of the blade and the other drawing the supporting plate for the blade-clamping plate against the back of a blade positioned in .the blade channel and forcing it into proper shaving position with relation to the guard with which such razors are provided.

A further object is a razor of the character just described in which the tensional force of the spring is exerted in a plane that passes as near as possible through the line of application of the clamping pressure on the blade.

Referring to the drawing:

Fig. 1 is a side view, partly in section, of a razor embodying the invention, a blade being shown therein in shaving position;

Fig. 2 is a view similar to Fig. 1 but showing the blade-clamping members separated by reason of the presence in the head of the aligning finger of an injector magazine;

Fig. 3 is a View on the line 3--3 of Fig. 1 and showing in addition, in dotted lines, the finger of an injector magazine;

Fig. 4 is a top plan View of the razor head with parts broken away to more clearly show the construction.

Referring to the drawing more in detail, 'the .razor comprises a conventional handle I0 into which is socketed the shank II. The plate I2 for reinforcing the shank may be also socketed in turn terminates in a guard I1. At each end of the guard is positioned a stop, the two stops being indicated by the numerals I8, I8, which function along with the other parts, presently to be described, to definitely position the edge of a blade with reference to the guard.

A rear supporting plate I9 which is bent over to form the blade-clamping plate 20 is connected to the shank by means of a hook 2| struck out and formed from the material of the rear plate I9. The hook engages in the aperture 22 in the shank and the connection forms a very loose hinge, the function and mode of operation of which will be later described.

The degree of looseness of the hinge is preferably such as to permit the clamping plate and the supporting plate I9 to virtually float to a limited extent vindependently of each other and to take their own positions with relation to the blade-supporting platform and the shank I4. The purpose of this will become apparent when the mode of operation is described.

The clamping plate 20 and the blade-supporting platform I6 converge slightly in the direction of the guard, as shown in Fig. 1, so that the line of application of clamping pressure on the blade is oiset from the median line of the blade slightly in the direction of the stops. The purpose of this is to iirmly'clamp the blade at the proper place for avoiding, so far as possible, all tendency to chatter when the implement is in use.

The clamping plate 20 and the blade-supporting platformA I6 are resiliently urged toward each other, and also the rear plate I9 is resilient- 1y urged toward the stops by means of the spring 23. This spring 23 is preferably in the form of a yoke and is enabled to perform its function by the fact that at its middle portion it is bowed over the part 24 which separates the two slots 25, 25, each half-length of the spring extending 'through one of these slots and thence through one of the slots 25a, 25a. It is preferable that the ends 26, 26 of the spring be tipped upwardly to form bearings to contact approximately in the vertex formed by theblade platform and the shank portion i4. The sense of the general plane of the force exerted by the spring (which is under tension at all times) is such, as will be observed, that, in effect, it has two components-one .drawing the rear plate I9 toward the shank I4 in the handle along with the shank, and in effect and the other drawing the clamping plate 20 toward' the blade platform. The floating connection between the rear plate I9 and the shank portion I4 permits such an action to take place unrestrictedly. Therefore, for example, the blade A (see Fig. 1) is clamped firmly between the clamping plate 20 and the blade platform I6 and is also thrust in the direction of the stops I8 until its edge abuts against them. It is to be assumed, as will be obvious, that in a razor head of given dimensions and amplitude of movement of parts, the blade is wide enough to prevent actual contact of the shoulder 21 with the shank portion |4 or the blade-supporting platform I6. Of course, as will be obvious, if it is desired to use blades of a given width, the dimensions of the component parts of the razor and the amplitudes of movement given them Wquld be adjusted to a blade of the selected width.

It will be observed that between the rear plate |9 and the shank I4 is a. slot 29, the width of which, when the parts are in the position shown in Fig. 1, is equal to or slightly greater than the thickness of the aligning finger 30 (see Figs. 2 and 3) of a magazine injector, and its height, which is determined by the spacing of the bent portions 3| and 32, is such that the aligning linger While in the slot is rigidly although not tightly retained against up and down play.

The magazine injector itself forms no part of the invention, although the invention is adapted to be used with it. It may be of an already wellknown type now in extensive commercial use, an example of which is illustrated and described in the Rodrigues United States Patent No. 2,109,017 issued February 22, 1938.

It should be stated, however, with reference to the mode of operation that the aligning finger is provided with a cam 33 which projects sufiiciently so that, .when the finger is inserted in the slot 29, the clamping plate 2U and the rear supporting plate I9 are displaced asa unit away from the blade-supporting plate I6 and the shank portion |4-i. e., to the position lshown in Fig. 2. The parts are so dimensioned and proportioned that the amount of displacement of the Aclamping plate 20 from the blade-supporting plate I6 is only such as to permit the blade A to be ejected with a slight frictional resistance; in fact, it may be more correctly stated that there preferably is no actual displacement of the clamping plate 20, but.'

on the contrary, merely release of tension.

In explaining how the motion just described takes place and what causes it, attention is directed to the hook 2| which projects through the slot 22 in the shank. Assuming the parts to be in the relative positions shown in Fig. 1 (i. e., with a blade clamped firmly in shaving position with its edges abutting the stops I8, I8 and pressed into contact by the tension of the spring 23 acting against the back of the blade through the shoulder 21), the insertion of the magazine finger rst causes the rear plate I9 with its connected blade-clamping plate 20 to move bodilyi. e., with a translatory motion to the rear of the razor, or, referring to the drawing, to the right, as shown in Fig. 1. During a portion of this motion there is no substantial release of pressure of the blade-clamping plate 28 against the blade. However, as this motion progresses but before it is completed, the tip of the hook 2| contacts with theedge 34 of the aperture 22, and from then on until the completion of the motion, the rear plate I9 pivots on the edge 34, thus changing the. translatory motion to rotary motion and causing the blade-clamping plate 20 to rise slightly. Pressure on the blade A is consequently relieved. As stated above, it is not necessary, and in fact 'it is not desirable that the blade-clamping plate 20 entirely part contact with the blade. It is sufficient that the spring vtension be relieved enough to permit th blade A to be easily but not freely ejected. y thus retaining aslight pressure on the blade A after completion of the provided by forming the struck-out portion 36 which tapers inwardly as it' approaches its inner end. The cam 33 therefore first causes the rear plate I9 and blade-clamping plate 20 to move rearwardly with respect to the razor and then, when the tip of the hook 2| has contacted with the edge 34, a motion of rotation takes place, thus relieving pressure of the blade-clamping plate 28 on the blade.

A new blade may then be injected into the blade channel in the usual manner, the blade that is to be replaced being ejected from the blade channel in advance of it. The position just described is shown in Fig. 2. On withdrawal of the magazine injector aligning finger, the parts take the position shown in Fig. 1 'by virtue of the stress exerted by the spring 23.

While I have described a certain particular construction in which my invention is incorporated, I do not desire to be limited to this particular embodiment since many changes and modifications may easily be made without departing from the spirit and scope of the invention as set forth in the following claims.

I claim:

1. In a razor, a shaving head comprising two members, one member comprising a blade platform provided with a support therefore and a guard, the blade platform and support being at an angle to each other, the second member comprising a back plate adjacent the support and a blade clamping plate overlying the blade platform, a spring under tension resiliently retainingA the two members in nesting relation, the direction of tensional force exerted by the spring being the resultant of two components oneacting to draw the clamping plate and the blade platform together and the othei` acting to draw the back plate and the blade platform support together.

2. In a razor, a shaving head comprising` two members, one member comprising a blade'platform provided with a guard and blade edge aligning stops and also a support for the platform, the blade platform and support being at an angle to each other, the said second member comprising a back plate adjacent the support and also a blade clamping plate overlying the blade platform, a spring under tension resiliently retaining the two members in nesting relation, therdirection of tensional force exerted by the spring being the resultant of two components, one acting to draw the clamping plate and the blade platform together and the other acting to draw the back plate and the blade platform support together.

LEOPOLD KUHNL. 

